Apparatus for boring the connecting rods and bearings of internal-combustion engines



A ril 7, 1925.

M. K. MAKAREWIEZ APPARATUS FOR BORING THE CONNECTING RODS- AND BEARINGSOF INTERNAL COMBUSTION ENGINES Filed Dec. 1922 3 Sheets-Sheet 1 Y b c Ow m f N 1 /M M Y a Apnl 7, 1925. 1,532,914

M. K. MAKAREWIEZ APPARATUS FOR BORI THE CONNECTING RODS AND BEARINGS 0FINT AL COMBUSTION ENGINES Filed Dec. 6 192g 5 Sheets-Shoot 21|llhlllllilllllillllHllll Apnl 7, 1925. 1,532,914-

M. K. MAKAREWIEZ APPARATUS FOR BORING THE CONNECTING RODS AND BEARINGSOF INTERNAL COMBUSTION ENGINES Filed Dec. 6, 1922 5 Sheets-Sheet 5 Z. EI 5 m Mk PM Vm E 0 mm H M A 5v W5 2 w N 13 1L 5 a u u! o w X PatentedApr. 7, 1925.

UNITED STATES PATENT OFFICE.

MARIUS KLEIBER MAKAREWIEZ, F CO'URBEVOIE-SEINE, FRANCE.

APPARATUS FOR BORING THE CONNECTING RODS AND BEARINGS OF INTERNAL-GOM-BUSTION ENGINES.

Application filed December 6, 1922. Serial No. 605,220.

To (ZZZ whom it may concern:

Be it known that I, MARIUS KLEBER Maxamiwrnz, a citizen of the FrenchRepublic. of 65 Rue de la Sabliere, Courbevoie,

l Seine, France, have invented Apparatus for Boring the Connecting Rodsand Bearings of Internal-Combustion Engines. of which the following is afull, clear, and exact description.

The invention relates to an apparatus adapted to be used for the quickand adequate boring of the cross-heads or blg ends of connecting-rodsfor internal-combustion engines, as well as for the boring of their 15bearings.

This apparatus essentially comprises a bed upon which the work is placedand secured after adjustment, and this so that a tool-holding shaftpasses through the eye of the connecting-rod crosshead, which asupporting stem introduced into the lower eye of the connectingrod holdsthe same on the bed.

The apparatus also comprises a differential gear which allows to causethe tool holding shaft to advance slowly in a rectilinear directionwhile the same rotates quickly upon itself. This gear allowsfurthermore, through a clutch and suitable couplings, to carry quicklythe shaft towards the work and to return same also quickly to itsoriginal position while it continues to rotate at the same speed.

This apparatus answers perfectly well to its purpose by the fact that itenables any repairing workman to quickly and adequately bore theconnecting-rods and bearings without it being necessary to make use of acostly lathe.

This invention will be hereinafter described with reference to theaccompanying drawings in which:

Fig. 1 shows in cross-vertical section one form of construction of theapparatus.

Fig. 2 is a plan view of same, and

Fig. 8 is a side view seen from the righthand side of Fig. 1.

Fig. 4. is a rear view of the apparatus.

Figs. 5 and 6 show a subsidiary tool used when boring bearings.

Fig. 7 shows in side-elevation a second mode of construction of thisapparatus.

8 is a corresponding plan view.

Fig. 9 is an end-view from the left of Figs. 7 and 8.

Fig. 10 is a vertical section taken on-the center line of the shaft 1)and corresponding to Fig. 9 of the drawings. 7

Fig. 11 shows, in side-view, a nut-collar or clamping-collar appliedupon the shaft of this apparatus in a position correspondmg to Figs. 9and 10 of the drawings.

Fig. 12 shows the same clamping collar in a position at right angle tothe shaft upon which it is mounted. As shown in the drawings, theapparatus, in the form of construction shown in Figures 1 to 4,comprises a frame or bed a of a rectangular shape, provided at one end,on the sides, with the bearings a through which passes the shaft 22carrying the tool 0, while the bed a is adapted to support the piece ofwork.

The shaft 0; is provided with screw threads upon a part of its len thand is provided with a driving fly-wheel 6 The projection of the tool 0from the shaft is regulated and adjusted by means of a screw drivingdevice 0 the head of which carries a setting or adjusting graduation orscale.

Upon the threaded part of the shaft b is mounted a nut (Z meshing withthe screwthreads of this shaft. This nut is made of two parts which forma collar, and are hinged or pivoted to an axle d and provided with aclosing or locking device on the side opposite to the axle.

The shaft 6 is surrounded by a smooth sleeve 6 and these two parts areconnected together by a key 6 carried by the shaft.

Upon one end of the sleeve 6 is fixed a pinion f adapted to mesh anotherpinion (7 connected with a shaft h passing throng the bearing.

To the opposite end of this shaft h is keyed another pinion i whichtransmits the motion to a pinion j which is loose upon the sleeve 6 butwhich is connected with the nut d by means of the axle (1 upon which thetwo parts of this nut are pivoted.

This reducing gear operating the nut can vary as to the ratio betweenthe pinions.

By opening the nut d, the shaft 1; may be caused to slide in its sleeve6, to the right.

On one side of the frame a is a right-angle cheek or jaw a carrying atthe top a graduation or scale a This jaw is provided with a straightslot at in which can slide a bolt supporting two conical rings Z Zturned in an opposite direction the one to the other.

The bed a also carries two opposing clamping screws m.

The foot or small end of the connectingrod which is to be bored beingmounted on the cones, the pointer of the cone Z is brought opposite theslot or graduation a corresponding to the distance apart between twoaxles which is to be given to the connecting-rod; this rod is thensecured by means of the clamping screws m.

The shaft 6 is then partly removed from the bed and introduced into theeye of the crosshead of the connecting-rod; the projection of the tool 0is adjusted by means of the screw 0 the tool being placed close to theconnecting-rod, the nut (Z is closed upon the threaded part of the shaft6, and then by turning the flywheel b with the hand the automaticadvance of the tool 0 is caused. The nut d is thus carried along, but ata speed which is less than that of the tool-holding shaft, according toa suitable ration between the pinions.

This apparatus can also be driven mechanically.

For the boring of bearings, the cones Z l are removed and also the clampscrews m, and the subsidiary tool 11., Figures 5 and 6, is fixed to thebed a by mounting the same in the slot a of this bed. The bearings whichare to be bored are placed in the parts p p which are clamped by meansof bolts q and the centering as to the height is obtain-ed andmaintained by using the r, Figure 6, and the scale a Fig. 2.

In the second form of construction shewn in Figures 7 to 11, theapparatus also comprises a frame or bed a provided at one end, on thesides, with the bearings a and a bracket a through which thetool-carrying shaft 6 passes.

The shaft 1; as before pointed out is threaded upon a part of its lengthand is provided with a rectilinear groove 6 extending from one end tothe other, and, it

pointer is mounted loosely in sleeve 6. An annularprevents the said headfrom rotating.

The sleeve 6 carries a clutch pulley t which is loose thereon and saidpulley is provided on its opposite faces wlth clutch teeth t.

The head 8 and the pulley t can also be shifted in and out of gear byvirtue of their particular mounting, by means of two forks u, a the armsof which are engaged into grooves formed in these respective parts. Thefork u is secured fast to the driving shaft 0 of the clutch, while thefork u is loosely mounted on the same shaft 0 between two stops 1) '0fixed upon the said shaft and provides for dead or lost motion.

A spring latch 00 which is adapted for engagement in either one of twonotches or grooves formed in the socket of the fork u of the pulley It,serves to maintain this fork and this pulley either in or out of gear,as it will be explained later on.

.A handle 3 pivotally mounted at 3 and suitably jointed at 3 to the axle2; serves to operate the said forks u u.

On the side opposite to the head 8, the pulley t is provided with teetht in front of gearing teeth f carried by a small pinion f loose on thesleeve e.

The small pinion f is in mesh with the large pinion g keyed upon shaft bsaid shaft being provided on the other side of the bearing, with thesmall pinion z meshing with the large pinion j loosely mounted upon thesleeve 6.

This pinion j is connected with the collar d, made of two parts andforminga nut threaded upon the shaft 6. The two branches or parts ofthis collar are hinged together upon the axle al while the same branchesor parts are crossed on the side opposite to the axle and at right angleto the latter by a threaded bolt d having on one end a nut (i andprovided at the other or head end with a lever clamping cam 03*. Aspring (1 interposed between the two parts of this collar causes thelatter to separate when the cam d is in the loosene position.

The shaft 6 carries the tool 0 held by the screw-device 0 whosegraduated head permits adjusting'the projection of the nose of thistoolinto the piece of work.

A support comprising the threaded pin or bolt 7:: carries cones Z, Z theone of whichl, is movable and acts as a nut. This support can slide inthe straight slot a provided in the cheek or jaw a of the bed a, infront of the graduated scale a The two side clamp screws m clamp betweenthem, after adjustment, the piece of work. Finally a clamping screw 2 isemployed to hold the piece of work from underneath and serves to adjustthe height of the latter.

The tool a is first brought rapidly towards the work, but as soon asthis tool is about to come into contact with the work, its advance ormotion is slackened while the pulley 23 still turns at the same rate.This automatic differential advance of the toolholding shaft 6 isobtained through the medium of the gears f g i j, as above stated.

When the device is at rest, the pulley t is loose, but when the handle yis moved in the. direction indicated by the arrow, Figure 9, the" fork uis shifted to the left earrying with its head 8, which movement bringsthe teeth 8 of the head 8 in mesh with the teeth t of the pulley t.

The head 8 now being in gear with the pulley t and this head beingconnected with the screw tool-holding shaft b the latter rotates. i

The collarlbeingflunable to move in the rectilinear direction, the shaft1), driven directly at this moment by the pulley t, the head 8 and thenut y move forwards to the left at as fast speed. 1

If now the handle 1 is pushed home in same direction, Figure 9, thestop'0 mshes the fork u towards the left, so that this fork shifts at itsturn the pulley t, the teeth 6 of which come in gear or in mesh with theteeth f of the small pinion f.

The small pinion f meshes with the large pinion 9 connected through itsshaft h with the small pinion i meshing with the large pinion The pinion9' being connected with the nut d, the latter rotates at a reduced rateand as it can only rotate, it causes the shaft b to advance at arelatively slow speed as well as the tool 0 carried by the latter, whilethe rate of revolution remains the same.

At the last shifting of the clutch, the spring latch 01: has droppedinto the notch u and maintains the vcorresponding fork 11, and thepulley t in the working position.

The reverse of the above operation will put the mechanism out of gear.

During this time, and on account of the time lost according to theposition of the stop 0 the pulley t remains in gear, so that the pinionsf g i 7' continue to turn, but the shaft 2) no longer rotates becausethe driving head '8 is out of gear; hence, the nut (Z causes thescrew-tool-holding shaft 1) to return at a great speed.

In pushing home the handle y, the stop 'v acts upon the fork u of thepulley t,

which has the effect of bringing back the spring latch u to the firstnotch or groove of the clutch.

The forms, details, accessories, materials and sizes of this apparatuscan of course vary without departing in any way from the principle ofthe invention.

I claim- An apparatus of the character specified, comprising a platform,means for fixing the work thereon, a head perpendicularly and rigidlymounted on said platform, bearings carried by said head, a sectional nutsupported by one of said bearings, a tool holding shaft mounted in saidbearings, said shaft having a threaded-part engageablc in said nut andsupported by one of the bearings, a loose pulley mounted on said shaft,means for communicating a rotating movement to said shaft, means fortransmitting rotary movement to said nut and in the same direction assaid shaft, and at a lowerspeed, whereby to create a differentialmovement and giving to said shaft reduced displacing movement, means forputting the nut into and out of gear with the loose pulley, said meanscomprising a fork adapted to engage the nut, and a second fork adaptedto engage the loose pulley, a. shaft carrying said forks, the firstnamed fork being fixed on to said shaft, the second fork loosely mountedon the said shaft between a pair of stops fixed thereon and providedwith a pair of notches, whereby the second named fork and the pulley maybe put out of gear, and a hand leverpivotally mounted on said platformand articulated at its lower end to the end of the last named shaftwhereby to operate the said forks.

MARIUS KLEBER MAKAREVVIEZ.

